/* Variables de couleur et styles de base */
:root {
    --bg-color: #1a1a1a;
    --surface-color: #2c2c2c;
    --primary-color: #ffffff;
    --secondary-color: #a0a0a0;
    --accent-color: #007bff;
    --user-msg-bg: #005cbb;
    --bot-msg-bg: #3a3a3a;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
}

/* Conteneur principal */
#chat-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    background-color: var(--surface-color);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* En-tête */
.chat-header {
    padding: 20px;
    background-color: rgba(0,0,0,0.2);
    border-bottom: 1px solid #444;
    text-align: center;
}

.chat-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Section pour la clé API */
.api-token-section {
    padding: 16px;
    background-color: rgba(0,0,0,0.15);
    border-bottom: 1px solid #444;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.api-token-section label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary-color);
}

#hf-token-input {
    width: 100%;
    background-color: #4a4a4a;
    border: 1px solid #555;
    border-radius: 8px;
    padding: 10px;
    font-size: 0.9rem;
    color: var(--primary-color);
    font-family: 'Inter', sans-serif;
}

#hf-token-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-color);
}

.api-token-section .warning {
    font-size: 0.8rem;
    color: var(--secondary-color);
    text-align: center;
}

/* Zone des messages */
#message-area {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#message-area::-webkit-scrollbar { width: 8px; }
#message-area::-webkit-scrollbar-track { background: var(--surface-color); }
#message-area::-webkit-scrollbar-thumb {
    background-color: #555;
    border-radius: 20px;
    border: 2px solid var(--surface-color);
}

/* Bulles de message */
.message {
    max-width: 75%;
    padding: 12px 18px;
    border-radius: 20px;
    line-height: 1.5;
    word-wrap: break-word;
}

.user-message {
    background-color: var(--user-msg-bg);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 5px;
}

.bot-message {
    background-color: var(--bot-msg-bg);
    color: var(--primary-color);
    align-self: flex-start;
    border-bottom-left-radius: 5px;
}

/* Indicateur de frappe */
.typing-indicator {
    align-self: flex-start;
    display: flex;
    align-items: center;
    padding: 12px 18px;
    background-color: var(--bot-msg-bg);
    border-radius: 20px;
    border-bottom-left-radius: 5px;
}
.typing-indicator span {
    height: 8px; width: 8px;
    background-color: #999;
    border-radius: 50%;
    display: inline-block;
    margin: 0 2px;
    animation: bounce 1.4s infinite ease-in-out both;
}
.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }
@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1.0); }
}

/* Formulaire de saisie */
#input-form {
    display: flex;
    padding: 16px;
    border-top: 1px solid #444;
    gap: 12px;
}

#user-input {
    flex-grow: 1;
    background-color: #4a4a4a;
    border: none;
    border-radius: 12px;
    padding: 14px;
    font-size: 1rem;
    color: var(--primary-color);
    resize: none;
    font-family: 'Inter', sans-serif;
}

#user-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent-color);
}

#send-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0 24px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#send-button:hover:not(:disabled) { background-color: #0056b3; }
#send-button:disabled {
    background-color: #555;
    cursor: not-allowed;
}